用抗噪波损失改进宽学习系统,提升数据有扰动时的分类稳定性。
Robust Broad Learning System with Wave Loss for Classification under Data Uncertainty

- 引入非对称、有界、光滑的波损失函数,控制大误差惩罚
- 在30个UCI数据集上均优于经典BLS和鲁棒变体
- 对噪声和异常值更鲁棒,适合真实场景中的不确定数据
宽学习系统(BLS)通过随机特征映射和闭式解实现快速学习,是深度架构的有效替代。然而,其依赖平方误差损失,对噪声、异常值和标签污染高度敏感,限制了在现实场景中的可靠性。为此,本文提出Wave-BLS,一种集成波损失函数的鲁棒宽学习框架。该损失函数具有非对称性、有界性和光滑性,可实现对大误差的可控惩罚。新模型将标准最小二乘目标替换为基于波损失的优化问题,采用无需矩阵求逆的Nesterov加速梯度(NAG)方案高效求解,提升可扩展性。在30个UCI基准数据集上的大量实验表明,Wave-BLS始终优于经典BLS及多种鲁棒变体。通过Friedman和Nemenyi事后检验的统计验证确认改进显著。在受控噪声和异常值注入下的鲁棒性评估显示,即使在高污染环境下,Wave-BLS性能下降也远慢于BLS。结果证明,Wave-BLS是面对数据不确定性时稳定可靠的宽学习替代方案。
原文摘要 · Abstract (English)
Broad Learning System (BLS) offers an efficient alternative to deep architectures by enabling fast learning through randomized feature mapping and closed-form solutions. However, its reliance on squared error loss makes it highly sensitive to noise, outliers, and corrupted labels, limiting its reliability in real-world scenarios. To address this limitation, we propose Wave-BLS, a robust broad learning framework that integrates the wave loss function, which is asymmetric, bounded, and smooth, enabling controlled penalization of large errors. The proposed formulation replaces the standard least-squares objective with a wave-loss-based optimization problem, solved efficiently using a Nesterov accelerated gradient (NAG)-based scheme without requiring matrix inversion, thereby improving scalability. Extensive experiments on 30 UCI benchmark datasets demonstrate that Wave-BLS consistently outperforms classical BLS and several robust variants. Statistical validation using Friedman and Nemenyi post-hoc tests confirms the significance of the observed improvements. Furthermore, robustness evaluations under controlled noise and outlier injection reveal that Wave-BLS exhibits substantially slower performance degradation compared to BLS, even in challenging contamination settings. These results establish Wave-BLS as a stable and robust alternative to existing broad learning models for learning under data uncertainty.
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